The beta was released on November 5, 2007, while the software development kit (SDK) was released on November 12, 2007. There were at least two internal releases of the software inside Google and the OHA before the beta version was released. The development of Android started in 2003 by Android, Inc., which was purchased by Google in 2005. 2.11.1 Android 4.4W KitKat, with wearable extensions.
